Corridor Data

What follows is the data behind the designation, the record that has guided the TransAmerica Corridor from congressional authorization toward construction. The foundation here is largely state-led: planning and priority documents from the state transportation departments along the corridor, each independently identifying segments of this route through their own technical processes. That state-level record is grounded further by the long-term analytical work of Dr. Lonnie Haefner, who studied the corridor’s traffic and economic potential from 1987 to 2011, and by the original 1994 Transamerica Transportation Corridor Feasibility Study that helped establish the corridor’s technical baseline.

With the broader Future Interstate research compiled through the CAFI Coalition, these sources form a consistent, traceable record — not speculation, but documented findings from the agencies and researchers closest to the corridor itself. The pages that follow lay out that record study by study, so that any policymaker, partner, or coalition member can see exactly what’s been measured, where it came from, and why it justifies moving this corridor from authorization to appropriation.

Some of the projects listed, while not being directly part of the I-66 System, are nevertheless either a possible future segment or share a common corridor.